27998926488 has 96 divisors (see below), whose sum is σ = 81952874640. Its totient is φ = 8584531200.

The previous prime is 27998926481. The next prime is 27998926499. The reversal of 27998926488 is 88462989972.

27998926488 is a `hidden beast` number, since 279 + 98 + 9 + 264 + 8 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27998926481) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 212038 + ... + 317738.

Almost surely, 2^27998926488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27998926488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40976437320).

27998926488 is an abundant number, since it is smaller than the sum of its proper divisors (53953948152).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27998926488 is a wasteful number, since it uses less digits than its factorization.

27998926488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106009 (or 106002 counting only the distinct ones).

The product of its digits is 250822656, while the sum is 72.

The spelling of 27998926488 in words is "twenty-seven billion, nine hundred ninety-eight million, nine hundred twenty-six thousand, four hundred eighty-eight".